Fix broken check for emtpy param value.

diff --git a/src/varcache.c b/src/varcache.c
index 9bc14f2ee8c2893b51c3682c3097e555b50c67b0..33dc634b13473821e49ae2b14d7e103aaf51dcdd 100644 (file)
--- a/src/varcache.c
+++ b/src/varcache.c
@@ -68,7 +68,7 @@ set_value:
        cache->var_list[lk->idx] = NULL;
 
        /* ignore empty value */
-       if (!value && !value[0])
+       if (!value || !value[0])
                return false;
 
        /* set new value */